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- What's New
- Function Overview
- Service Overview
- Getting Started
-
User Guide
- Usage Rules
- Billing Management
- Data Migration
- Instance Lifecycle Management
- Instance Modifications
- Read Replicas
- Database Management
- Account Management (Non-Administrator)
- Data Security
- Data Backups
- Data Restorations
- Connection Management
-
Parameter Template Management
- Creating a Parameter Template
- Modifying a Parameter Template
- Exporting Parameters
- Comparing Parameter Templates
- Viewing Parameter Change History
- Replicating a Parameter Template
- Resetting a Parameter Template
- Applying a Parameter Template
- Viewing Application Records of a Parameter Template
- Editing a Parameter Template Description
- Deleting a Parameter Template
- Metrics and Alarms
- Interconnection with CTS
- Log Management
- Task Center
- Managing Tags
- Managing Quotas
- Change History
- Best Practices
- Performance White Paper
- Security White Paper
- SDK Reference
-
API Reference
- Before You Start
- API Overview
- Calling APIs
-
APIs (Recommended)
- DB Engine Version Queries
- Database Specification Queries
-
Instance Management
- Creating a DB Instance
- Querying DB Instances
- Rebooting a DB Instance
- Deleting a DB Instance
- Querying Details of a DB Instance
- Querying Details of DB Instances in Batches
- Creating a Read Replica
- Deleting a Read Replica
- Scaling up Storage of a Yearly/Monthly DB Instance
- Changing a DB Instance Name
- Resetting a Database Password
- Changing DB Instance Specifications
- Querying Dedicated Resource Pools
- Querying Dedicated Resources
- Configuring the Monitoring By Seconds Function
- Querying the Configuration of Monitoring by Seconds
- Enabling or Disabling SSL
- Binding an EIP
- Unbinding an EIP
- Promoting a Read Replica to Primary
- Changing a Maintenance Window
- Modifying a Security Group
- Changing a Private IP Address
- Changing a Database Port
- Changing a DB Instance Description
- Backup Management
- Parameter Template Management
- Quota Management
- Log Management
- Tag Management
- Database User Management
- Database Management
- SQL Statement Concurrency Control
- Task Center
- APIs (Unavailable Soon)
- Permissions Policies and Supported Actions
- Appendix
- Change History
-
FAQs
- Product Consulting
-
Database Connections
- Can an External Server Access the GaussDB(for MySQL) Database?
- What Do I Do If the Number of GaussDB(for MySQL) Database Connections Reaches the Upper Limit?
- What Is the Maximum Number of Connections to a GaussDB(for MySQL) Instance?
- What Should I Do If an ECS Cannot Connect to a GaussDB(for MySQL) Instance?
- How Can I Connect to a MySQL Database Through JDBC?
- How Can I Create and Connect to an ECS?
- What Should I Do If a Database Client Problem Causes a Connection Failure?
- Why Cannot I Ping My EIP After It Is Bound to a DB Instance?
- What Can I Do If the Connection Test Failed?
- Can I Access a GaussDB(for MySQL) Instance over an Intranet Connection Across Regions?
- Are There Any Potential Risks If There Are Too Many Connections to a GaussDB(for MySQL) Instance?
- What Should I Do If an ECS and a GaussDB(for MySQL) instance Deployed in Different VPCs Cannot Communicate with Each Other?
- How Do I View All IP Addresses Connected to a Database?
- Client Installation
- Database Migration
- Database Permissions
-
Database Performance
- What Should I Do If the CPU Usage of My Instance Is High?
- How Do I Handle Slow SQL Statements Caused by Inappropriate Composite Index Settings?
- How Do I Handle a Large Number of Temporary Tables Being Generated for Long Transactions and High Memory Usage?
- What Should I Do If Locks on Long Transactions Block the Execution of Subsequent Transactions?
- Database Usage
- Backups
-
Database Parameter Modification
- How Can I Change the Time Zone?
- How Do I Configure a Password Expiration Policy for GaussDB(for MySQL) Instances?
- How Do I Ensure that the Database Character Set of a GaussDB(for MySQL) Instance Is Correct?
- How Do I Use the utf8mb4 Character Set to Store Emojis in a GaussDB(for MySQL) Instance?
- How Do I Set Case Sensitivity for GaussDB(for MySQL) Table Names?
- Can I Use SQL Commands to Modify Global Parameters?
-
Network Security
- What Security Assurance Measures Does GaussDB(for MySQL) Have?
- How Can I Prevent Untrusted Source IP Addresses from Accessing GaussDB(for MySQL)?
- How Do I Configure a Security Group to Enable Access to a GaussDB(for MySQL) Instance?
- How Can I Import the Root Certificate to a Windows or Linux Server?
- How Do I Manage and Ensure GaussDB(for MySQL) Security?
- Log Management
- Version Upgrade
- Change History
-
Troubleshooting
-
Backup and Restoration Issues
- Insufficient Permissions During Data Export Using mysqldump
- How Do I use mysqlbinlog to Obtain Binlog Files?
- Canal Fails to Parse Binlogs
- Precautions for Exporting Large Tables Through mysqldump
- Commands for Exporting Data Through mysqldump
- System Inaccessible After Field Addition to a Database Table
- SQL Statements Such as SET @@SESSION.SQL_LOG_BIN Displayed After You Run mysqldump
- Insufficient Permissions Reported for Canal
-
Connection Issues
- Login Failed After ssl_type of root Is Changed to ANY
- Failed to Connect to a DB Instance Using SSL
- Description of Each IP Address
- SSL Connection Failed Due to Inconsistent TLS Versions
- Error Message "connection established slowly"
- "Access denied" Displayed During Database Connection
- Failed to Connect to a Database Using mariadb-connector in SSL Mode
- Failed to Connect to a Database as User root
- Client Automatically Disconnected from a DB Instance
- Disconnection Occurs Every 45 Days Due to the istio-citadel Certificate Mechanism
-
SQL Issues
- Invalid TIMESTAMP Default Value during Table Creation
- Failed to Change the VARCHAR Length Due to the Index Length Limit
- Slow SQL Queries After a Large Amount of Data Is Deleted from a Large Table
- Error 1366 Reported When Data Containing Emojis Is Updated
- Slow Stored Procedure Execution Due to Inconsistent Collations
- ERROR [1412] Reported for a DB Instance
- Failed to Delete a Table with a Foreign Key
- Incorrect GROUP_CONCAT Results
- Error Message "Too many keys specified" Displayed When a Secondary Index Is Created
- DISTINCT and GROUP BY Optimization
- Equivalent Comparison Failures with Floating-Point Numbers
- Tablespace Bloat
- ERROR 1396 Reported When a User Is Created
- Error Message Reported When alter table xxx discard/import tablespace Is Executed
- Native Error 1461 Reported by a DB Instance
- "Row size too large" Reported When a Table Failed to Be Created
- Parameter-related Issues
- Performance Issues
-
Basic Issues
- How Do I View Used Storage of My GaussDB(for MySQL) Instance?
- Renaming Databases and Tables
- Character Set and Collation Settings
- Auto-Increment Field Value Jump
- Starting Value and Increment of AUTO_INCREMENT
- Changing the AUTO_INCREMENT Value of a Table
- Failed to Insert Data Because Values for the Auto-increment Primary Key Field Reach the Upper Limit
- Auto-increment Field Values
- AUTO_INCREMENT Not Displayed in the Table Structure
- Impact of Creating an Empty Username
- No Scanned Rows Recorded in Slow Query Logs
- Change History
-
Backup and Restoration Issues
- Videos
Configuring a Same-Region Backup Policy
Scenarios
When you create an instance, an automated backup policy is enabled by default and cannot be disabled. However, it can be modified after instance creation is complete. GaussDB(for MySQL) backs up data based on the automated backup policy you specify.
GaussDB(for MySQL) backs up data at the instance level. If a database is faulty or data is damaged, you can still restore it from backup to ensure data reliability. Backing up data affects the database read and write performance, so you are advised to set the automated backup time window to off-peak hours.
After an automated backup policy is configured, full backups are created based on the time window and backup cycle specified in the policy. The time required for creating a backup depends on how much data there is in the instance. Backups are stored for as long as you specified in the backup policy.
You do not need to set incremental backups because the system automatically performs an incremental backup every 5 minutes. The generated incremental backup can be used to restore the database and table data to a specified point in time.
Constraints
- Rebooting the instance is not allowed during full backup. Exercise caution when selecting a backup time window.
- When starting a full backup task, GaussDB(for MySQL) first tests connectivity to your instance. If the backup lock failed to be obtained from the DB instance, the verification fails and a retry is automatically performed. If the retry fails, the backup will fail.
- Performing a full backup may decrease instance throughput because it occupies node resources, especially disk bandwidth.
Viewing or Modifying a Same-Region Backup Policy
- Log in to the management console.
- Click
in the upper left corner and select a region and a project.
- Click
in the upper left corner of the page, choose Database > GaussDB(for MySQL).
- On the Instances page, click the instance name to go to the Basic Information page.
- Choose Backups in the left navigation pane, click Modify Backup Policy. You can view the configured backup policy. To modify the backup policy, adjust the parameter values as needed.
Table 1 Parameter description Parameter
Description
Retention Period
Number of days that your automated backups can be retained. The retention period is from 1 to 3,660 days and the default value is 7.
- Extending the retention period improves data reliability. You can configure the retention period if needed.
- If you shorten the retention period, the new backup policy takes effect for existing backups. Any backups (including full and automated backups) that have expired will be automatically deleted. Manual backups will not be automatically deleted but you can delete them manually.
Time Zone
The backup time is in UTC format. The backup time segment changes with the time zone during the switch between the DST and standard time.
Time Window
A one-hour period the backup will be scheduled within 24 hours, such as 01:00-02:00 or 12:00-13:00.
Backup Cycle
By default, each day of the week is selected. You can change the backup cycle and must select at least one day of the week.
- Click OK.
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